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Phenotypic and cytogenetic studies in self-poisoned patients
1Department of Human Genetics and Teratology, National Institute of Hygiene-WHO Collaborating Centre for the Community Control of Hereditary Diseases, Budapest, Hungary.
Abstract:
Persons who attempt suicide by taking high doses of chemicals but survive may represent an appropriate human model of mutagenesis epidemiology for the study of somatic and germinal mutagenicity of drugs, pesticides and other chemicals. The most important results of systematic studies in self-poisoning individuals over the last 20 years are summarized. Trichlorfon and diazepam caused a higher rate of aneuploidy in peripheral lymphocytes. The frequency of chromatid aberrations was lower in self-poisoned pregnant women than in self-poisoned non-pregnant women and these findings suggest a possible protective effect of pregnancy. Intrauterine growth retardation was found in children born after self-poisoning.
Insights
Individuals surviving high-dose chemical ingestion offer a unique model for studying chemical mutagenicity. Pregnancy may protect against certain genetic damage, but can lead to intrauterine growth retardation in offspring.
Area of Science:
- Toxicology
- Human mutagenesis epidemiology
- Environmental health
Background:
- Individuals surviving intentional high-dose chemical ingestion serve as a valuable human model for mutagenesis research.
- Studying these individuals allows for the assessment of both somatic and germinal mutagenicity of various chemical agents.
Purpose of the Study:
- To summarize key findings from systematic studies on self-poisoning individuals over the past two decades.
- To investigate the mutagenic effects of specific chemicals and the potential influence of pregnancy on these effects.
Main Methods:
- Systematic review and summarization of studies on individuals who attempted suicide via chemical ingestion.
- Analysis of chromosomal aberrations, specifically aneuploidy and chromatid aberrations, in peripheral lymphocytes.
- Comparison of mutagenicity rates between pregnant and non-pregnant self-poisoning individuals.
Main Results:
- Trichlorfon and diazepam exposure was associated with increased aneuploidy rates in peripheral lymphocytes.
- A lower frequency of chromatid aberrations was observed in pregnant self-poisoning women compared to non-pregnant women.
- Intrauterine growth retardation was identified in children born to mothers who had self-poisoned during pregnancy.
Conclusions:
- Self-poisoning survivors provide a relevant model for human mutagenesis epidemiology.
- Pregnancy may confer a protective effect against certain chemical-induced genetic damage.
- Chemical exposures in pregnant individuals can negatively impact fetal development, leading to conditions like intrauterine growth retardation.